An original method for measuring the stator leakage reactance of synchronous machines

This paper proposes an original method for accurately measuring the stator leakage reactance of synchronous machines. The approach relies on an experimental equivalence of resulting fluxes between the unsaturated open-circuited and permanent short-circuited tests. This requires the presence of measurement turns in the air gap of the machine. A complete comparison with existing methods (Potier, El-Serafi & Wu, rotor removed test and geometric calculation) is moreover proposed. A critical analysis is performed, and pros and cons of each method are highlighted.